Electromagnetic control valve

Details Electromagnetic control valve Electromagnetic control valve

2005-09-20

2005-09-20

Look, Edward K. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

With means to bias valve open

C251S129190

Reexamination Certificate

active

06945508

ABSTRACT:
An electromagnetic control valve is provided. The control valve includes a housing defining a bore and a fluid passageway having a seat. A valve element is slidably disposed in the bore and is moveable between a first position where a flow of fluid passes by the seat and a second position where a flow of fluid relative to the seat is blocked. A solenoid having an armature is operatively connected with the valve element. The solenoid is operable to move the valve element from the first position to the second position. A biasing assembly is operatively engaged with the valve element and is adapted to move the valve element from the second position towards the first position. The biasing assembly exerts a first force on the valve element during a first predetermined travel distance from the second position and a second force on the valve element during a second predetermined travel distance. The first force is greater than the second force.

REFERENCES:
patent: 4717118 (1988-01-01), Potter
patent: 4869462 (1989-09-01), Logie et al.
patent: 5118076 (1992-06-01), Homes
patent: 6021963 (2000-02-01), Coldren et al.
patent: 6029682 (2000-02-01), Lewis et al.
patent: 6349739 (2002-02-01), Burgoni et al.

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